. >> guest: this is a v6 ford engine block, and ford sent this to us. and you can actually download this on our web site. and it's the real model for an actual six-cylinder engine that i scaled down and made on my makerbot with pla on a rep replicator 2. i'm a total gearhead, so i love this model. i just love engines. but i never knew, you know, i've taken engines apart and put them back together, but i've never seen the inside of an engine. it's made out of iron, right? by making it on my makerbot, i got to see all the different places where all the coolant goes and how they keep that separate from the oil. getting a makerbot is also an education in how things are made in the manufacturing process and in the world around us. >> host: are you the inventer? >> guest: you can blame me.